POWEROFF(8) poweroff POWEROFF(8)
poweroff, reboot, halt - Power off, reboot, or halt the machine
poweroff [OPTIONS...] reboot [OPTIONS...] halt [OPTIONS...]
poweroff, reboot, and halt may be used to power off, reboot, or halt the machine. All three commands take the same options.
The following options are understood: --help Print a short help text and exit. --halt Halt the machine, regardless of which one of the three commands is invoked. -p, --poweroff Power off the machine, when either halt or poweroff is invoked. This option is ignored when reboot is invoked. --reboot Reboot the machine, regardless of which one of the three commands is invoked. -f, --force Force immediate power-off, halt, or reboot. If specified, the command does not contact the init system. In most cases, filesystems are not properly unmounted before shutdown. For example, the command reboot -f is mostly equivalent to systemctl reboot -ff, instead of systemctl reboot -f. -w, --wtmp-only Only write wtmp shutdown entry, do not actually power off, reboot, or halt. -d, --no-wtmp Do not write wtmp shutdown entry. -n, --no-sync Don't sync hard disks/storage media before power-off, reboot, or halt. --no-wall Do not send wall message before power-off, reboot, or halt.
On success, 0 is returned, a non-zero failure code otherwise.
These commands are implemented in a way that preserves basic compatibility with the original SysV commands. systemctl(1) verbs poweroff, reboot, halt provide the same functionality with some additional features. Note that on many SysV systems halt used to be synonymous to poweroff, i.e. both commands would equally result in powering the machine off. systemd is more accurate here, and halt results in halting the machine only (leaving power on), and poweroff is required to actually power it off.
systemd(1), systemctl(1), shutdown(8), wall(1)
This page is part of the systemd (systemd system and service manager) project. Information about the project can be found at ⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug report for this manual page, see ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/systemd/systemd.git⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-06-23.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com systemd 253 POWEROFF(8)
Pages that refer to this page: reboot(2), systemd.directives(7), systemd.index(7), fsck.minix(8), mkfs.minix(8), shutdown(8)